Barrel Bushing for 1911 Government Model, all calibers. Machined from stainless steel with natural finish. Flange is .100" thick and matches perfectly with the 10-8 Spring Plug or most Colt/GI style plugs. Flange has carry bevel machined into outside edge. OD is nominal .702", ID (bore) is nominal .579" with straight bore. Designed as a drop in style replacement for your factory bushing, typically requiring minimal fitting in most Government Model style slides.